Detachable hoisting apparatus



DETACHABLE HOISTING APPARATUS Filed April 26, '1948 IN V EN TOR.

figg/ dm/72d?? Mam Patented Apr. 22, 1 95'2 UNITED STATES PATENT OFFICE 2,593,764 v l DETACHABLE nols'rING APPAnA'Usf Fred E. Kaunitz, Jr., Bay City, Mich." Application April 2s, 194s, serial Naf-calais s claims. (ci. 212-8) This invention relates to hoisting apparatus adapted to be mounted on an automobile truck, and more particularly to an apparatus which can be readilymounted on and/or removed from the truck, so that it may be used for hoisting steel plates. structural beams, or other materials and quickly removed to permit the truck to be used in the conventional manner.

One of the prime objects of the invention is to design a hoisting mechanism including a'quickly removable boom structure, which is relatively light in weight, which will hoist and handle heavy loads of all kinds, and which is tiltable to any desired angle of inclination to handle the load required.

Another object is to provide a hoisting mechanism including a boom and associated winch, together with means for guying the boom to rigidly secure it in set position.

A further object is to provide a lightweight, yet strong, substantial structure by means of which relatively heavy loads and/or members can be easily handled with a minimum of time and labor, with the consequent savings incident thereto.

Still a further object is to provide a quickly detachable hoisting apparatus composed of few parts, all of which are of relatively simple design, and which are economical to manufacture and assemble.

With the above and other objects in view, the present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawing, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion,and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawing:

Fig. 1 is a fragmentary, side-elevational view showing a conventional motor truck with my improved hoisting apparatus in position thereon.

Fig. 2 is a rear-elevational view thereof.

Referring now more particularly to the drawing in which I have shown the preferred embodiment of my invention. The numeral 5 indicates the frame of a conventional motor vehicle, provided with an axle A supported on ground-engaging -wheels 6 as usual. Springs 1 are mounted on the axle and connect to the frame, and brackets 8 are mounted on the main frame and are secured in position by means of bolts 9 in the conventional manner.

A nfth wheel I0 is mounted in the bearing brackets 8 by "means of pins II, and a plate I2 having upwardly projecting beams I3 is secured to the face thereof, these beams being tied together by means of horizontally disposed braces I4 which form 'a boo-m. This boom can be of any desired length, and plates I5 are welded to the boom and to the plate I2 respectively to reinforce the structure.

A transversely disposed pin IB spans the upper end of the boom B, and a sheave I1 is journaled thereon and over which a hoist cable I8 is trained, a bridle I9 being provided as shown and provides a guide for said cable.

Brackets 20 are attached to the boom adjacent the upper end thereof, and chains C" are anchored thereto and to brackets 2| provided 'on the vehicle frame. Similar brackets 22 are provided on the opposite side of said boom, and chains 23 connect thereto and to the brackets 24 provided on the end of the main frame, these chains holding the boom in set position after the chains have been adjusted.

The winch W" is of conventional design, and is mounted on the vehicle frame in any desired manner, the cable I8 being wound on the drum 25, thence leading over the sheave I'I, with a grab hook H on the end thereof for attaching to structural plates, beams, or other materials to be hoisted, spotted, or moved, this winch being drivingly connected to the power take oi (not shown) of the vehicle.

The angle' of inclination of the boom can be readily changed or adjusted by adjusting the length ofthe chains C and V23, and to removeV the boom lassembly entirely, it is merely necessary to release the safety catch (not shown) in any standard fifth wheel assembly, unhook the chains. and the boom assembly is then free for removal, so that the truck can then be used for any other purpose.

From the foregoing description, it will be ob- Ivious that I have perfected a very simple, practical, and relatively inexpensive hoisting apparatus which can be easily and quickly mounted and/or removed, and by means of which structural materials and articles of all kinds can be hoisted, conveyed and spotted in desired location.

What I claim is:

1. A detachable hoisting apparatus adapted to be detachably mounted on a truck frame, a fth wheel hingedly connected to said frame, a boom structure including a disc-shaped plate secured to the fifth wheel and tiltable therewith, front brackets on the front of said boom structure adjacent the upper end thereof and on the truck brackets, a plate xedly mounted on said fifth wheel, upwardly projecting structural members` welded to the face of said plate to form a boom,j

front brackets secured to the front face of the boom directly adjacent the upper vend thereof,

and flexible means anchored to said brackets andl to the truck frame at a point spaced forwardly of said fth wheel, rear brackets secured to the rearface of the boom at a point intermediate its length, and exible means connecting saidrear brackets and the truck frame at a point spaced rearwardly of said fifthl wheel, a driven Winch spaced forwardly of the fifth Wheel, a sheave on the boom, and a hoist line trained over said sheave and connected to said winch.

3.v A hoisting apparatus adapted to be detachably mounted on a truck frame,bracke,ts on said frame, a fth Wheel hingedly 4connected to saic brackets, a tiltable boom structure rigidly connected to said fth wheel and comprising a discshaped plate including interconnected, spacedapart boom members having their lower ends welded to said plate to form ya rigid structural unit, front brackets secured to the front face of the boom members at a point adjacent the upper end thereof, rear brackets secured to the rear face ofr said boom members, and flexible vmeans connected to said front and rear brackets respectively and to the frame in front of and in the rear of said boom for holding it in set position.

FRED E. KAUNITZ, J R.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 653,518 Cody July 10, 1900 1,255,313 Hurstt al. Feb. 5, 1918 1,300,649 Raymond Apr. 15, 1919 1,393,361 Harris Oct..11, 1921 2,168,128 Kervarrec Aug. 1, 1939 2,378,915 Davidson June 26, 1945 

